[EricH]

With the disclaimer above firmly attached, I point you to the 2013 rule R38, emphasize the wording "the Power Distribution (PD) Board" (which, I might add, is repeated in multiple locations later in that section of the robot manual), and as a former inspector remind you that the rule says that you gotta match the figure in that rule--in short, sorry, only one PDB is allowed.

I then go to R47 to remind you that only one motor controller or relay circuit is allowed per breaker, in case you were thinking of running 2 controllers from one output.

In short... not legal. Maybe you should look into pneumatics or servos; those are less limited in number, and have more flexibility to add a control area--but they also have limitations like limited power or limited positioning.